Denitrification--3 hours, 0.3 CEU
Denitrification provides a review of the biological principles of denitrification and their application in process control, troubleshooting, permit compliance, and cost-effective operation. The review is designed for treatment plants that are required to denitrify, treatment plants that may choose to denitrify to improve process operations, and treatment plants that experience undesired denitrification.
The review includes the roles of denitrifying bacteria as well as favorable and unfavorable operating conditions that significantly impact the bacteria and the ability of the treatment process to denitrify. Operational conditions presented are soluble cBOD, oxygen gradient, nutrients, pH, temperature, and redox. The review also focuses on the benefits of desired denitrification and the unfortunate consequences of undesired denitrification.
Topics covered include sources of nitrite ions and nitrate ions, the anoxic environment, comparison of aerobic and anoxic respiration and the impact on the treatment process, gaseous end products from anoxic respiration, monitoring denitrification, and controlling undesired denitrification. The use of simultaneous nitrification and denitrification (SND) and "zoning" are illustrated.
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